Structural-steel frame for dynamo-electric machines



Oct. 16, 1923.

C. B. MILLS STRUCTURAL STEEL FRAME For: DYNAMO ELECTRIC MACHINES Filed Nov. 16. 1918 AT TORN EY Patented Oct. 16, 1923.

UNITED STATES. PATENT OFFICE.

CHESTER B. MILLS, OF EAST MCKEESPORT, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

STRUCTURAL-STEEL FRAMZE FOR DYNAMIC-ELECTRIC MACHINES.

Application filed November 16, 191B. Serial No. 262,895.

T all whom it may concern Be it known that I, CHESTER B. M'ILLs, a citizen of the United States, and a resident of lilast l\rlcl\'eesporl, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in StructlualBteel Frames for lilynamo-lllectrio Machines, of which the following is a specification.

My invention relates to (tlynamo-electric machine frames and it has particular relation to the frames of relatively large machines and supports therefor, having for its object the provision of a novel, rugged, simple and inexpensive structure of the character designated.

Heretofore, it has been customary, especially in large machines of the above-mew tioned character to cast the feet integral with the frames. This practice is objectionable because a defective foot portion of a casting may necessitate condemnation of the entire casting and also because castings of large size are more likely to have defects 25 than those of relatively small size. Further more, when a machine is to be mounted in. a very limited space. such, for example, as in a ship hull, it is sometimes desirable to mount the supports thereof at different levels, which, of course, requires special drawings, special patterns and special castings, the expense of which is very great for large machines. I

By my invention, I provide a foot member separate from the frame, which may be mounted thereon in any position so that, for a special machine, all parts will be standard except the foot casting which is relatively simple and inexpensive. Also, the foot is so constructed that the frame is strengthened thereby, which is very desirable, especially in lniilt-up skeleton frames which are now (:(H'llllig into more general. use. Such a structure also has the additional advantage that it is not necessary to know the exact mounting facilities before the building of the machine may be started, as is necea cast-on support is used.

By my invention, I provide also. a novel method of forming a frame of the character designated and novel means for attaching together component parts of such frame.

:leferring to the accompanying drawings, Fig. 1 is an end elevational view of a porry when.

tion of a dynamo-electric machine frame constructed -.in"accordance with my invention; and Fig. 2 is a view of the structure shown in Fig. 1,, partially in section and partially in elevation, the section being taken along the line II-II of Fig. 1.

The frame of my machine consists of a plurality of annular members 1 of substantially channel shape in cross section and held in side-by-side spaced relationship by means of cover plates 2 and 3 upon the outer periphery thereof and by bars 4 that extend at right angles to said annular mem bers and are riveted to the inner peripheries thereof. Each of the annular members 1 consists of two semi-annular members 5 and 6 which are joined together by means of bolts '2' and the flanges of clamping members 8 which are riveted to ring sections 5 and 6 and/also by means of bolts 9 and flanges 10 of, bars 11 and 12 which are 'iveted to the inner peripheries of the members 5 and 6, respectively. The bars t serve also as a means for mounting laminations within the frame. The frame is provided with two support members 14 and 15, each comprising an areuate portion 16 of substantially the same radius of curvature as the outer periphery of the members 1, and afoot portion 17 by which it is attached to suitable base. Each of the supporting members 14: and 15 is of substantially the width as the entire machine and the arcuate porion 16 thereof is attached to each of said annular members 1 by means of rivets 1%.

The members and 6 are formed by rolling or pressing standard structural-steel forms, such as channel or I-bars into semiannular members which are afterwards fastened together as previously described. By reason of the hut that the periphery of the rii 1 substantiz-illy covered by the clamping members supports 14 and 15 and. the arcuate plates 2 and 3, the structure rendered very stroi'lg and rigid with a minimum amount of weight.

From the foregoing description, it will be understood by those skilled in the art that, in building a soecial machine, irrespective of the fact that the mounting facilities therefor are unknown, the building pcration may be started, since the only special parts necessary are the supporting members which may be mounted anywhere upon the periphery of the machine frame.

While I have shown but one form of my invention. it will be obvious to those skilled in the art that it is not so limited but is susceptible of various n'iinor changes and modifications without departing from the spirit thereof. and I desire. therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or are specifically set forth in the appended claims.

I claim as my invention:

1. In a dynamo-electric machine, a frame comprising a plurality of annular members mounted in side-by-side relation and each comprising two semi annular sections adapted to be detachably secured together, bars attached to the inner periphery of each of said annular members and means 'joining the bars at adjacent ends of two sections.

2. In a dynamo-electric machine, a frame comprising a plurality of annular members mounted in side-by-side relation and each comprising two semiannular sections bars attached to each of said annular members and flanges provided on the bars at the ends of the sections, and means tor attaching together the flanges of coac'ting" bars on the two sections.

In testimony whereof I have hereunto subscribed my name this 28th day of Oct, 1918.

CHESTER B. MILLS. 

